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EP0318715A1 - Pipe joint - Google Patents

Pipe joint Download PDF

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Publication number
EP0318715A1
EP0318715A1 EP88118296A EP88118296A EP0318715A1 EP 0318715 A1 EP0318715 A1 EP 0318715A1 EP 88118296 A EP88118296 A EP 88118296A EP 88118296 A EP88118296 A EP 88118296A EP 0318715 A1 EP0318715 A1 EP 0318715A1
Authority
EP
European Patent Office
Prior art keywords
intermediate ring
pipe connection
connection according
pipe
end faces
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88118296A
Other languages
German (de)
French (fr)
Other versions
EP0318715B1 (en
Inventor
Ernst Nock
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nock Ernst
Original Assignee
Nock Ernst
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Filing date
Publication date
Application filed by Nock Ernst filed Critical Nock Ernst
Priority to AT88118296T priority Critical patent/ATE60414T1/en
Publication of EP0318715A1 publication Critical patent/EP0318715A1/en
Application granted granted Critical
Publication of EP0318715B1 publication Critical patent/EP0318715B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
    • F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/025—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges
    • F16L19/028—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges the collars or flanges being obtained by deformation of the pipe wall
    • F16L19/0283—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges the collars or flanges being obtained by deformation of the pipe wall and having a bell-mouthed shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
    • F16L19/04—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts using additional rigid rings, sealing directly on at least one pipe end, which is flared either before or during the making of the connection
    • F16L19/041—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts using additional rigid rings, sealing directly on at least one pipe end, which is flared either before or during the making of the connection the ring being an insert
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/16—Flanged joints characterised by the sealing means
    • F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
    • F16L23/20—Flanged joints characterised by the sealing means the sealing means being rings made exclusively of metal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S285/00—Pipe joints or couplings
    • Y10S285/906—Equivalents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S285/00—Pipe joints or couplings
    • Y10S285/917—Metallic seals

Definitions

  • the invention relates to a pipe connection, in particular a sealless high-pressure pipe connection.
  • the high-pressure pipe connections known hitherto generally contain relatively large flanges, the minimum pipe wall thickness to be selected for a given pressure also generally being determined by the possibility of the connection.
  • the invention has for its object to provide a new type of pipe connection, in particular a sealless high-pressure pipe connection, which is characterized by significant material savings on the pipes to be connected and on the connecting elements.
  • the pipe ends and the intermediate ring are non-positively clamped together by the clamping means in such a way that a perfect metallic seal results from the plastic deformation. This eliminates the need for separate sealing elements and results in a physical and chemical resistance that corresponds to the pipe material. Due to the metallic seal, the pipe connection is fire-safe.
  • the pipe wall thickness is not determined by the connection option, but can be designed according to the physical requirements.
  • Assembly and disassembly of the pipe connection according to the invention are simple. They do not require welding or soldering and require and short working hours. Except for the intermediate ring, all parts of the pipe connection can be reused.
  • the pipe connection according to the invention is particularly suitable for pipe materials which allow cold working of 15 to 20%, for example stainless steels, steels, copper, aluminum, etc.
  • FIGS. 1 to 19 of the drawing Some embodiments of the invention are illustrated in FIGS. 1 to 19 of the drawing.
  • a coaxially arranged intermediate ring 3 is inserted between the pipes 1 and 2 to be connected to one another, the outer diameter of which is somewhat larger than the outer diameter of the pipes 1, 2.
  • a part (3a, 3b) of the two end faces of the intermediate ring 3 is beveled towards the outside.
  • the conical beveled part is followed by an end part 3c, 3d, which is formed by a plane surface running perpendicular to the axis of the intermediate ring.
  • a ring ge sealing lip 8 and 9 is provided.
  • the ends 1 a, 2 a of the pipes 1, 2 to be connected to the intermediate ring 3 are widened conically, the cone angle of the widening approximately corresponding to the cone angle of the chamfering of the parts 3 a, 3 b of the end face of the intermediate ring 3.
  • Clamping means are also provided, by means of which the widened pipe ends 1a, 2a and the intermediate ring 3 are non-positively clamped together in the axial direction of the pipes, the sealing lips 8, 9 plastically deforming, so that a tight connection between the pipe ends and the intermediate ring is produced .
  • these clamping means contain two flanges 5, 6, which are clamped in the axial direction by screws (not shown in FIG. 1).
  • the bore diameter of the flanges 5, 6 corresponds approximately to the outer diameter of the tubes 1, 2.
  • the bore of the flanges 5, 6 merges into a conical surface 5a, 5b, the conical angle of which corresponds to that of the conical parts 3a, 3b of the intermediate ring 3.
  • the cone angle of the individual cone surfaces is preferably between 30 and 45 °, for example approximately 37 °.
  • the widening of the pipe ends 1a, 2a is expediently 1.1 to 1.5 times, preferably 1.15 to 1.2 times the inner pipe diameter.
  • the intermediate ring 3 is usually made of the same material as the tubes 1, 2.
  • the inner diameter of the intermediate ring 3 corresponds approximately to the inner tube diameter.
  • the bolt circle diameter and the outer shape of the flanges 5, 6 are significantly smaller than in conventional flanges.
  • the weight is only a fraction (for example 30%) of a conventional flange.
  • the widened pipe ends 1a, 2a are clamped between the conical surfaces of the intermediate ring 3 and the flanges 5, 6. This creates a non-positive connection between the two pipe ends and the intermediate ring.
  • the load capacity of the connection corresponds to that of the two pipes both physically and chemically.
  • the sealing lips 8, 9 on the end faces of the intermediate ring 3 are plastically deformed by the tensile force of the screws and in this way compensate for unevenness as occurs, for example, on longitudinally welded pipes. In this way, a perfect metallic seal is achieved.
  • sealing lips While in the two embodiments described so far, the sealing lips have an approximately triangular cross-section, thus tapering towards the outside or approximately pointed, in the embodiment according to FIG. 4 sealing lips 18, 18 ', 19, 19' are provided, which have an approximately semicircular shape Have cross-section.
  • the two end faces of the intermediate ring 3 are tapered inwards and outwards (parts 3a ', 3b', 3c ', 3d'), the annular sealing lips 18, 19 being provided at the transition between the two cone surfaces .
  • Fig. 6 shows a variant in which in the region of the conically tapered part of the end faces of the intermediate ring 3, three sealing lips 28, 28 ', 28 ⁇ and 29, 29', 29 ⁇ of approximately rectangular cross section are provided.
  • Fig. 7 shows a variant with four annular sealing lips (38, 38 ', 38 ⁇ , 38 ′′′) of approximately triangular cross-section on both tapered end faces of the intermediate ring 3rd
  • the intermediate ring is composed of an inner ring part 3x with flat end faces and an outer ring part 3y with conical end faces.
  • the two ring parts 3x and 3y can be firmly connected to one another in a suitable manner or can only be inserted loosely into one another.
  • the length of the inner ring part 3x is slightly larger than that of the outer ring part 3y, so that the outer edges of the inner ring part 3x form the annular sealing lips 48, 49.
  • the end faces of the intermediate ring 3 each provided with three annular sealing lips 58, 58 ', 58 58, 59', 59 ', 59', run perpendicular to the axis of the intermediate ring.
  • the ends 1a, 2a of the tubes facing the intermediate ring are widened like a flange, perpendicular to the tube axis.
  • the intermediate ring 3 has flat end faces, the annular sealing lips 68, 69 being formed by the outer edges of the intermediate ring 3.
  • the tube ends 1a, 2a are also flared in this embodiment and are positively and positively braced by the flanges 5, 6 or other clamping means with the intermediate ring 3, the sealing lips 68, 69 deforming plastically.
  • the intermediate ring 3 has a substantially T-shaped cross-sectional profile, the web 3w of the intermediate ring which engages between the flared tube ends 1a, 2a carrying the sealing lips 78, 79 which are formed by a thickening of a circular cross-section will.
  • the clamping means are formed by two deformable annular projections 3e, 3f, which are supported by a web 3g arranged on the outer circumference of the intermediate ring 3, the web 3g and the two annular projections 3e, 3f being firmly attached to the Intermediate ring 3 connected, preferably integrally formed with it.
  • the web 3g and the two annular projections 3e, 3f being firmly attached to the Intermediate ring 3 connected, preferably integrally formed with it.
  • the upper half section of FIG. 13 shows the clamping means 3e, 3f in the undeformed state, while the lower half section of FIG. 3 shows the pipe connection in the closed state.
  • the annular projections 3e, 3f are deformed in such a way that they press the widened ends 1a, 2a of the tube 1 against the conical end faces of the intermediate ring 3 in a force-fitting manner.
  • the conical end faces of the intermediate ring 3 are provided with sealing lips according to one of the variants already explained.
  • all clamping means can be used in the pipe connection according to the invention, which apply sufficient force in the axial direction to the expanded pipe ends in order to plastically deform the sealing lips of the intermediate ring and to produce a non-positive connection of the pipe ends to the intermediate ring.
  • Various types of screw connections are also possible, for example.
  • the intermediate ring 3 is widened in the outer region 3z and is supported with this widened region 3z on the end faces of the conically widened pipe ends 1a, 2a.
  • This support ensures that the intermediate ring 3 is not pressed inwards by the clamping force of the clamping means (not shown in FIG. 14).
  • Such a support is particularly advantageous for pipes of large diameter.
  • the design of the intermediate ring 3 otherwise corresponds to the exemplary embodiments according to FIGS. 2 to 8.
  • annular sealing lips are formed, for. B. 18, 18 'and 19, 19' is provided.
  • the sealing surfaces are designed as annular sealing lips throughout.
  • the intermediate ring 3 contains a core 3k made of a high-strength material and an easily deformable surface layer 3m which forms the sealing surfaces.
  • This deformable surface layer takes over the sealing instead of the annular sealing lips when the pipe ends 1a, 2a and the intermediate ring 3 are clamped together by the clamping means (not shown in FIG. 15).
  • the fixed core 3k of the intermediate ring 3 absorbs the forces that occur during a positive connection.
  • the intermediate ring can also be made from a material whose hardness is greater than the hardness of the tube material.
  • the surfaces of the pipe ends in contact with the sealing surfaces of the intermediate ring are plastically deformed. The seal is thus achieved by the deformation of the widened tube wall which bears against the sealing surfaces or sealing lips of the intermediate ring.
  • the one of the two pipes to be connected to one another is formed here by a connector provided on the fitting or machine, which has a cone adapted to the intermediate ring.
  • a nozzle 2 ' is welded to the machine housing 20, the end 2'a of which is flared and is connected to the end 1a of the tube 1 via the intermediate ring 3, as already explained with reference to FIG. 14 has been.
  • Flanges 5, 6 serve as clamping means.
  • the embodiment according to FIG. 18 is similar to FIG. 17.
  • the machine housing 20 ' is provided with a molded connection piece 20'd, which has a cone 20'a for contacting the intermediate ring 3, and which has a thread 20'e on its outer casing side, which for Inclusion of an internally threaded flange 6 'is used.
  • the connection can be made and released by a common rotary movement of the flanges 5, 6 '(which are connected to one another by means of clamping means) about the pipe axis, without the relative position of the flanges 5, 6' changing from one another.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

Die Erfindung betrifft eine Rohrverbindung, bei der zwischen die aufgeweiteten Rohrenden (1a, 2a) ein an seinen Stirnseiten mit Dichtlippen versehener Zwischenring (3) eingefügt ist und Spannmittel vorgesehen sind, die die aufgeweiteten Rohrenden und den Zwischenring kraftschlüssig miteinander verspannen, wobei die Dichtlippen des Zwischenringes plastisch verformt werden.The invention relates to a pipe connection, in which an intermediate ring (3) provided with sealing lips on its end faces is inserted between the widened pipe ends (1a, 2a) and tensioning means are provided which non-positively brace the widened pipe ends and the intermediate ring, the sealing lips of the Intermediate ring are plastically deformed.

Description

Die Erfindung betrifft eine Rohrverbindung, insbe­sondere eine dichtungslose Hochdruck-Rohrverbindung.The invention relates to a pipe connection, in particular a sealless high-pressure pipe connection.

Die bisher bekannten Hochdruck-Rohrverbindungen ent­halten im allgemeinen verhältnismäßig groß dimensio­nierte Flansche, wobei auch die für einen vorgege­benen Druck zu wählende Mindest-Rohrwandstärke im allgemeinen durch die Möglichkeit der Verbindung be­stimmt wird.The high-pressure pipe connections known hitherto generally contain relatively large flanges, the minimum pipe wall thickness to be selected for a given pressure also generally being determined by the possibility of the connection.

Der Erfindung liegt die Aufgabe zugrunde, eine neu­artige Rohrverbindung, insbesondere eine dichtungs­lose Hochdruck-Rohrverbindung, zu schaffen, die sich durch wesentliche Materialeinsparungen an den zu ver­bindenden Rohren sowie an den Verbindungselementen auszeichnet.The invention has for its object to provide a new type of pipe connection, in particular a sealless high-pressure pipe connection, which is characterized by significant material savings on the pipes to be connected and on the connecting elements.

Diese Aufgabe wird erfindungsgemäße durch die kenn­zeichnenden Merkmale des Anspruches 1 gelöst. Zweck­mäßige Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved according to the invention by the characterizing features of claim 1. Appropriate embodiments of the invention are the subject of the dependent claims.

Bei der erfindungsgemäßen Rohrverbindung werden die Rohrenden und der Zwischenring durch die Spannmittel kraftschlüssig derart miteinander verspannt, daß sich durch die plastische Verformung eine einwandfreie metallische Ab­dichtung ergibt. Dadurch sind gesonderte Dichtungs­elemente entbehrlich und es ergibt sich eine physi­kalische und chemische Beständigkeit, die dem Rohr­werkstoff entspricht. Bedingt durch die metallische Abdichtung ist die Rohrverbindung feuersicher.In the pipe connection according to the invention, the pipe ends and the intermediate ring are non-positively clamped together by the clamping means in such a way that a perfect metallic seal results from the plastic deformation. This eliminates the need for separate sealing elements and results in a physical and chemical resistance that corresponds to the pipe material. Due to the metallic seal, the pipe connection is fire-safe.

Verglichen mit bekannten Flanschverbindungen ergeben sich durch die erfindungsgemäße Lösung erhebliche Materialeinsparungen an den zu verbindenden Rohren sowie an den Verbindungsteilen. Die Rohrwandstärke wird hierbei nicht durch die Verbindungsmöglich­keit bestimmt, sondern kann entsprechend den phy­sikalischen Erfordernissen ausgelegt werden.Compared to known flange connections significant savings in material on the pipes to be connected and on the connecting parts. The pipe wall thickness is not determined by the connection option, but can be designed according to the physical requirements.

Montage und Demontage der erfindungsgemäßen Rohr­verbindung sind einfach. Sie erfordern weder Schweißen noch Löten und benötigen und kurze Ar­beitszeiten. Bis auf den Zwischenring sind alle Teile der Rohrverbindung wieder verwendbar.Assembly and disassembly of the pipe connection according to the invention are simple. They do not require welding or soldering and require and short working hours. Except for the intermediate ring, all parts of the pipe connection can be reused.

Die erfindungsgemäße Rohrverbindung ist besonders für Rohrwerkstoffe geeignet, die eine Kaltverfor­mung von 15 bis 20 % zulassen, beispielsweise Edel­stähle, Stähle, Kupfer, Aluminium usw.The pipe connection according to the invention is particularly suitable for pipe materials which allow cold working of 15 to 20%, for example stainless steels, steels, copper, aluminum, etc.

Einige Ausführungsbeispiele der Erfindung sind in den Fig. 1 bis 19 der Zeichnung veranschaulicht.Some embodiments of the invention are illustrated in FIGS. 1 to 19 of the drawing.

Bei der in den Fig.1 und 2 dargestellen Ausfüh­rungsform der erfindungsgemäßen Rohrverbindung ist zwischen die miteinander zu verbindenden Rohre 1 und 2 ein koaxial angeordneter Zwischenring 3 ein­gefügt, dessen Außendurchmesser etwas größer als der Außendurchmesser der Rohre 1, 2 ist.In the embodiment of the pipe connection according to the invention shown in FIGS. 1 and 2, a coaxially arranged intermediate ring 3 is inserted between the pipes 1 and 2 to be connected to one another, the outer diameter of which is somewhat larger than the outer diameter of the pipes 1, 2.

Ein Teil (3a, 3b) der beiden Stirnseiten des Zwi­schenringes 3 ist nach außen zu konisch abge­schrägt. Nach innen schließt sich an den konisch abgeschrägten Teil ein Stirnseitenteil 3c, 3d an, der durch eine senkrecht zur Achse des Zwischen­ringes verlaufende Planfläche gebildet wird. Am Übergang zwischen dem planen und konisch abge­schrägten Teil der Stirnseiten ist eine ringförmi­ ge Dichtlippe 8 bzw. 9 vorgesehen.A part (3a, 3b) of the two end faces of the intermediate ring 3 is beveled towards the outside. On the inside, the conical beveled part is followed by an end part 3c, 3d, which is formed by a plane surface running perpendicular to the axis of the intermediate ring. At the transition between the flat and tapered part of the end faces there is a ring ge sealing lip 8 and 9 provided.

Die dem Zwischenring 3 zugewandten Enden 1a, 2a der miteinander zu verbindenden Rohre 1, 2 sind konisch aufgeweitet, wobei der Konuswinkel der Aufweitung etwa dem Konuswinkel der Abschrägung der Teile 3a, 3b der Stirnseite des Zwischenrin­ges 3 entspricht.The ends 1 a, 2 a of the pipes 1, 2 to be connected to the intermediate ring 3 are widened conically, the cone angle of the widening approximately corresponding to the cone angle of the chamfering of the parts 3 a, 3 b of the end face of the intermediate ring 3.

Es sind ferner Spannmittel vorgesehen, durch die die aufgeweiteten Rohrenden 1a, 2a und der Zwi­schenring 3 in Achsrichtung der Rohre kraftschlüs­sig miteinander verspannt werden, wobei sich die Dichtlippen 8, 9 plastisch verformen, so daß eine dicht Verbindungen zwischen den Rohrenden und dem Zwischenring hergestellt wird.Clamping means are also provided, by means of which the widened pipe ends 1a, 2a and the intermediate ring 3 are non-positively clamped together in the axial direction of the pipes, the sealing lips 8, 9 plastically deforming, so that a tight connection between the pipe ends and the intermediate ring is produced .

Bei dem Ausführungsbeispiel gemäß Fig.1 enthalten diese Spannmittel zwei Flansche 5, 6, die durch (in Fig.1 nicht dargestellte) Schrauben in axialer Richtung verspannt werden. Der Bohrungsdurchmesser der Flansche 5, 6 entspricht etwa dem Außendurch­messer der Rohre 1, 2.In the exemplary embodiment according to FIG. 1, these clamping means contain two flanges 5, 6, which are clamped in the axial direction by screws (not shown in FIG. 1). The bore diameter of the flanges 5, 6 corresponds approximately to the outer diameter of the tubes 1, 2.

Auf der dem Zwischenring 3 zugewandten Seite geht die Bohrung der Flansche 5, 6 in eine Konusfläche 5a, 5b über, deren Konuswinkel dem der konischen Teile 3a, 3b des Zwischenringes 3 entspricht.On the side facing the intermediate ring 3, the bore of the flanges 5, 6 merges into a conical surface 5a, 5b, the conical angle of which corresponds to that of the conical parts 3a, 3b of the intermediate ring 3.

Der Konuswinkel der einzelnen Konusflächen (bezo­gen auf die Rohrachse 4) liegt vorzugsweise zwi­schen 30 und 45°, beispielsweise bei ca. 37°.The cone angle of the individual cone surfaces (based on the tube axis 4) is preferably between 30 and 45 °, for example approximately 37 °.

Die Aufweitung der Rohrenden 1a, 2a beträgt zweck­mäßig das 1,1- bis 1,5-fache, vorzugsweise das 1,15- bis 1,2-fache des Rohrinnendurchmessers.The widening of the pipe ends 1a, 2a is expediently 1.1 to 1.5 times, preferably 1.15 to 1.2 times the inner pipe diameter.

Der Zwischenring 3 besteht in der Regel aus dem gleichen Werkstoff wie die Rohre 1, 2. Der Innen­durchmesser des Zwischenringes 3 entspricht etwa dem Rohrinnendurchmesser.The intermediate ring 3 is usually made of the same material as the tubes 1, 2. The inner diameter of the intermediate ring 3 corresponds approximately to the inner tube diameter.

Der Lochkreis-Durchmesser sowie die äußere Form der Flansche 5, 6 sind wesentlich kleiner als bei herkömmlichen Flanschen. Das Gewicht beträgt nur einen Bruchteil (beispielsweise 30 %) eines übli­chen Flansches.The bolt circle diameter and the outer shape of the flanges 5, 6 are significantly smaller than in conventional flanges. The weight is only a fraction (for example 30%) of a conventional flange.

Als Verbindungselemente können bei dem Ausführungs­beispiel gemäß Fig. 1 handelsübliche Schrauben ver­wendet werden.Commercially available screws can be used as connecting elements in the exemplary embodiment according to FIG. 1.

Bei der Herstellung der Rohrverbindung werden die aufgeweiteten Rohrenden 1a, 2a zwischen den Konus­flächen des Zwischenringes 3 und der Flansche 5, 6 eingespannt. Dadurch entsteht eine kraftschlüssige Verbindung der beiden Rohrenden mit dem Zwischen­ring. Die Belastbarkeit der Verbindung entspricht sowohl physikalisch als auch chemisch der der bei­den Rohre.When producing the pipe connection, the widened pipe ends 1a, 2a are clamped between the conical surfaces of the intermediate ring 3 and the flanges 5, 6. This creates a non-positive connection between the two pipe ends and the intermediate ring. The load capacity of the connection corresponds to that of the two pipes both physically and chemically.

Die Dichtlippen 8, 9 an den Stirnseiten des Zwi­schenringes 3 werden durch die Zugkraft der Schrauben plastisch verformt und gleichen auf die­se Weise Unebenheiten aus, wie sie beispielsweise an längsgeschweißten Rohren vorkommen. Auf diese Weise wird eine einwandfreie metallische Abdich­tung erreicht.The sealing lips 8, 9 on the end faces of the intermediate ring 3 are plastically deformed by the tensile force of the screws and in this way compensate for unevenness as occurs, for example, on longitudinally welded pipes. In this way, a perfect metallic seal is achieved.

Bei dem Ausführungsbeispiel gemäß Fig. 3 sind an den beiden Stirnseiten des Zwischenringes 3 je zwei Dichtlippen 8, 8′ und 9, 9′ vorgesehen, die mit Abstand voneinander angeordnet sind. Im übri­ gen entspricht die Gestaltung des Zwischenringes 3 sowie die der aufgeweiteten Rohrenden 1a, 2a dem Ausführungsbeispiel gemäß den Fig. 1 und 2.3, two sealing lips 8, 8 'and 9, 9' are provided on the two end faces of the intermediate ring 3, which are arranged at a distance from each other. Otherwise The design of the intermediate ring 3 and that of the widened pipe ends 1a, 2a correspond to the exemplary embodiment according to FIGS. 1 and 2.

Während bei den beiden bisher beschriebenen Aus­führungsbeispielen die Dichtlippen einen etwa dreieckförmigen Querschnitt besitzen, nach außen hin somit spitz bzw. annähernd spitz zulaufen, sind bei der Ausführung gemäß Fig. 4 Dichtlippen 18, 18′, 19, 19′ vorgesehen, die einen etwa halb­kreisförmigen Querschnitt besitzen.While in the two embodiments described so far, the sealing lips have an approximately triangular cross-section, thus tapering towards the outside or approximately pointed, in the embodiment according to FIG. 4 sealing lips 18, 18 ', 19, 19' are provided, which have an approximately semicircular shape Have cross-section.

Bei der Variante gemäß Fig. 5 sind die beiden Stirnseiten des Zwischenringes 3 nach innen und außen konisch abgeschrägt (Teile 3a′, 3b′, 3c′, 3d′), wobei die ringförmigen Dichtlippen 18, 19 am Übergang zwischen den beiden Konusflächen vorgese­hen sind.5, the two end faces of the intermediate ring 3 are tapered inwards and outwards (parts 3a ', 3b', 3c ', 3d'), the annular sealing lips 18, 19 being provided at the transition between the two cone surfaces .

Fig. 6 zeigt eine Variante, bei der im Bereich des konisch abgeschrägten Teiles der Stirnseiten des Zwischenringes 3 je drei Dichtlippen 28, 28′, 28˝ bzw. 29, 29′, 29˝ von etwa rechteckigem Querschnitt vorgesehen sind.Fig. 6 shows a variant in which in the region of the conically tapered part of the end faces of the intermediate ring 3, three sealing lips 28, 28 ', 28˝ and 29, 29', 29˝ of approximately rectangular cross section are provided.

Fig. 7 zeigt eine Variante mit je vier ringförmi­gen Dichtlippen (38, 38′, 38˝, 38‴) von etwa drei­eckförmigem Querschnitt an beiden konisch abge­schrägten Stirnseiten des Zwischenringes 3.Fig. 7 shows a variant with four annular sealing lips (38, 38 ', 38˝, 38 ‴) of approximately triangular cross-section on both tapered end faces of the intermediate ring 3rd

Gemäß Fig. 8 ist der Zwischenring aus einem inneren Ringteil 3x mit planen Stirnseiten und einem äuße­ren Ringteil 3y mit konischen Stirnseiten zusammen­gesetzt. Die beiden Ringteile 3x und 3y können in geeigneter Weise fest miteinander verbunden oder auch nur lose ineinandergesteckt sein. Die Länge des inneren Ringteiles 3x ist etwas größer als die des äußeren Ringteiles 3y, so daß die äußeren Kan­ten des inneren Ringteiles 3x die ringförmigen Dichtlippen 48, 49 bilden.According to FIG. 8, the intermediate ring is composed of an inner ring part 3x with flat end faces and an outer ring part 3y with conical end faces. The two ring parts 3x and 3y can be firmly connected to one another in a suitable manner or can only be inserted loosely into one another. The length of the inner ring part 3x is slightly larger than that of the outer ring part 3y, so that the outer edges of the inner ring part 3x form the annular sealing lips 48, 49.

Gemäß Fig. 9 verlaufenden die mit je drei ringförmi­gen Dichtlippen 58, 58′, 58˝, 59, 59′, 59˝ verse­henen Stirnseiten des Zwischenringes 3 insgesamt senkrecht zur Achse des Zwischenringes. Die dem Zwischenring zugewandten Enden 1a, 2a der Rohre sind flanschartig, senkrecht zur Rohrachse aufge­weitet.9, the end faces of the intermediate ring 3, each provided with three annular sealing lips 58, 58 ', 58 58, 59', 59 ', 59', run perpendicular to the axis of the intermediate ring. The ends 1a, 2a of the tubes facing the intermediate ring are widened like a flange, perpendicular to the tube axis.

Bei dem Ausführungsbeispiel gemäß Fig. 10 besitzt der Zwischenring 3 plane Stirnseiten, wobei die ringförmigen Dichtlippen 68, 69 durch die äuße­ren Kanten des Zwischenringes 3 gebildet werden. Die Rohrenden 1a, 2a sind auch bei diesem Ausfüh­rungsbeispiel konisch aufgeweitet und werden durch die Flansche 5, 6 oder sonstige Spannmittel mit dem Zwischenring 3 kraft- und formschlüssig ver­spannt, wobei sich die Dichtlippen 68, 69 pla­stisch verformen.In the exemplary embodiment according to FIG. 10, the intermediate ring 3 has flat end faces, the annular sealing lips 68, 69 being formed by the outer edges of the intermediate ring 3. The tube ends 1a, 2a are also flared in this embodiment and are positively and positively braced by the flanges 5, 6 or other clamping means with the intermediate ring 3, the sealing lips 68, 69 deforming plastically.

Bei der in Fig. 11 veranschaulichten Variante be­sitzt der Zwischenring 3 ein im wesentlichen T-för­miges Querschnittsprofil, wobei der zwischen die flanschartig aufgeweiteten Rohrenden 1a, 2a eingrei­fende Steg 3w des Zwischenringes die Dichtlippen 78, 79 trägt, die durch eine Verdickung von kreis­förmigem Querschnitt gebildet werden.In the variant illustrated in FIG. 11, the intermediate ring 3 has a substantially T-shaped cross-sectional profile, the web 3w of the intermediate ring which engages between the flared tube ends 1a, 2a carrying the sealing lips 78, 79 which are formed by a thickening of a circular cross-section will.

Bei dem Ausführungsbeispiel gemäß Fig. 12 sind für gleiche Bauteile dieselben Bezugszeichen wie in den Fig. 1 und 2 verwendet. Als Verbindungselemen­te, die die Rohrenden 1a, 2a, den Zwischenring 3 und die Flansche 5, 6 kraftschlüssig in axialer Richtung verspannen, sind hier Niete 7 vorgesehen.In the embodiment according to FIG. 12, the same reference numerals as in FIGS. 1 and 2 are used for the same components. As connecting elements, the pipe ends 1a, 2a, the intermediate ring 3rd and the flanges 5, 6 clamp non-positively in the axial direction, rivets 7 are provided here.

Bei dem Ausführungsbeispiel gemäß Fig. 13 werden die Spannmittel durch zwei verformbare ringförmi­ge Vorsprünge 3e, 3f gebildet, die von einem am äußeren Umfang des Zwischenringes 3 angeordneten Steg 3g getragen werden, wobei der Steg 3g und die beiden ringförmigen Vorsprünge 3e, 3f fest mit dem Zwischenring 3 verbunden, vorzugsweise einstük­kig mit ihm ausgebildet sind. Selbstverständlich ist auch eine Herstellung aus unterschiedlichen Materialien unter fester Verbindung möglich.13, the clamping means are formed by two deformable annular projections 3e, 3f, which are supported by a web 3g arranged on the outer circumference of the intermediate ring 3, the web 3g and the two annular projections 3e, 3f being firmly attached to the Intermediate ring 3 connected, preferably integrally formed with it. Of course, it is also possible to manufacture from different materials with a fixed connection.

Im oberen Halbschnitt der Fig. 13 sind die Spann­mittel 3e, 3f im nichtverformten Zustand veran­schaulicht, während der untere Halbschnitt der Fig. 3 die Rohrverbindung im geschlossenen Zustand zeigt. Die ringförmigen Vorsprünge 3e, 3f sind hierbei so verformt, daß sie die ausgeweiteten En­den 1a, 2a der Rohr 1 kraftschlüssig an die koni­schen Stirnseiten des Zwischenringes 3 pressen. Die konischen Stirnseiten des Zwischenringes 3 sind hierbei mit Dichtlippen gemäß einer der be­reits erläuterten Varianten versehen.The upper half section of FIG. 13 shows the clamping means 3e, 3f in the undeformed state, while the lower half section of FIG. 3 shows the pipe connection in the closed state. The annular projections 3e, 3f are deformed in such a way that they press the widened ends 1a, 2a of the tube 1 against the conical end faces of the intermediate ring 3 in a force-fitting manner. The conical end faces of the intermediate ring 3 are provided with sealing lips according to one of the variants already explained.

Generell können bei der erfindungsgemäßen Rohrver­bindung alle Spannmittel verwendet werden, die ge­nügend Kraft in axialer Richtung auf die aufgewei­teten Rohrenden aufbringen, um die Dichtlippen des Zwischenringes plastisch zu verformen und eine kraftschlüssige Verbindung der Rohrenden mit dem Zwischenring herzustellen. Es sind beispielsweise auch die verschiedensten Arten von Verschraubungen möglich.In general, all clamping means can be used in the pipe connection according to the invention, which apply sufficient force in the axial direction to the expanded pipe ends in order to plastically deform the sealing lips of the intermediate ring and to produce a non-positive connection of the pipe ends to the intermediate ring. Various types of screw connections are also possible, for example.

Bei dem Ausführungsbeispiel gemäß Fig. 14 ist der Zwischenring 3 im äußeren Bereich 3z verbreitert und stützt sich mit diesem verbreiterten Bereich 3z an den Stirnseiten der konisch aufgeweiteten Rohrenden 1a, 2a ab. Durch diese Abstützung wird erreicht, daß der Zwischenring 3 durch die Spann­kraft der (in Fig. 14 nicht dargestellten) Spannmit­tel nicht nach innen gedrückt wird. Eine derartige Abstützung ist vor allem für Rohre großen Durch­messers von besonderem Vorteil.In the exemplary embodiment according to FIG. 14, the intermediate ring 3 is widened in the outer region 3z and is supported with this widened region 3z on the end faces of the conically widened pipe ends 1a, 2a. This support ensures that the intermediate ring 3 is not pressed inwards by the clamping force of the clamping means (not shown in FIG. 14). Such a support is particularly advantageous for pipes of large diameter.

Bei dem Ausführungsbeispiel gemäß Fig. 14 ent­spricht die Gestaltung des Zwischenringes 3 im übrigen den Ausführungsbeispielen gemäß Fig. 2 bis 8. An den beiden Stirnseiten des Zwischen­ringes sind ringförmige Dichtlippen z. B. 18, 18′ bzw. 19, 19′ vorgesehen.In the exemplary embodiment according to FIG. 14, the design of the intermediate ring 3 otherwise corresponds to the exemplary embodiments according to FIGS. 2 to 8. On the two end faces of the intermediate ring, annular sealing lips are formed, for. B. 18, 18 'and 19, 19' is provided.

Bei den bisher beschriebenen Ausführungsbeispie­len sind die Dichtflächen durchwegs als ringför­mige Dichtlippen ausgebildet. Fig. 15 zeigt dem­gegenüber eine Variante, bei der der Zwischenring 3 einen Kern 3k aus einem Material hoher Festigkeit und eine die Dichtflächen bildende, leicht verform­bare Oberflächenschicht 3m enthält. Diese verform­bare Oberflächenschicht übernimmt hierbei anstelle der ringförmigen Dichtlippen die Abdichtung, wenn die Rohrenden 1a, 2a und der Zwischenring 3 durch die (in Fig. 15 nicht veranschaulichten) Spannmit­tel zusammengespannt werden. Der feste Kern 3k des Zwischenringes 3 nimmt die bei einer kraftschlüssi­gen Verbindung auftretenden Kräfte auf.In the exemplary embodiments described so far, the sealing surfaces are designed as annular sealing lips throughout. 15, on the other hand, shows a variant in which the intermediate ring 3 contains a core 3k made of a high-strength material and an easily deformable surface layer 3m which forms the sealing surfaces. This deformable surface layer takes over the sealing instead of the annular sealing lips when the pipe ends 1a, 2a and the intermediate ring 3 are clamped together by the clamping means (not shown in FIG. 15). The fixed core 3k of the intermediate ring 3 absorbs the forces that occur during a positive connection.

Bei den anhand der Fig. 1 bis 14 beschriebenen Aus­ führungsbeispielen kann ferner der Zwischenring aus einem Material hergestellt werden, dessen Härte größer als die Härte des Rohrwerkstoffes ist. In diesem Falle tritt beim kraftschlüssi­gen Verspannen der Rohrenden und des Zwischenrin­ges eine plastische Verformung der mit den Dicht­flächen des Zwischenringes in Berührung stehenden Flächen der Rohrenden ein. Die Abdichtung wird somit durch die Verformung der an den Dichtflächen bzw. Dichtlippen des Zwischenringes anliegenden, aufgeweiteten Rohrwandung erreicht.In the off described with reference to FIGS. 1 to 14 The intermediate ring can also be made from a material whose hardness is greater than the hardness of the tube material. In this case, when the pipe ends and the intermediate ring are frictionally clamped, the surfaces of the pipe ends in contact with the sealing surfaces of the intermediate ring are plastically deformed. The seal is thus achieved by the deformation of the widened tube wall which bears against the sealing surfaces or sealing lips of the intermediate ring.

Die Fig. 16 bis 19 zeigen schließlich noch einige Ausführungsbeispiele für die Anwendung der erfin­dungsgemäßen Rohrverbindung zum Anschluß von Ar­maturen und Maschinen. Das eine der beiden mit­einander zu verbindenden Rohre wird hierbei durch einen an der Armatur bzw. Maschine vorgesehenen Stutzen gebildet, der einen dem Zwischenring ange­paßten Konus aufweist.16 to 19 finally show some embodiments for the application of the pipe connection according to the invention for the connection of fittings and machines. The one of the two pipes to be connected to one another is formed here by a connector provided on the fitting or machine, which has a cone adapted to the intermediate ring.

Bei dem Ausführungsbeispiel gemäß Fig. 16 ist am Maschinengehäuse 20 ein Stutzen 2′ angeschweißt, dessen Ende 2′a konisch aufgeweitet ist und mit dem Ende 1a des Rohres 1 über den Zwischenring 3 so verbunden wird, wie dies anhand der Fig. 14 be­reits erläutert wurde. Als Spannmittel dienen Flansche 5, 6.16, a nozzle 2 'is welded to the machine housing 20, the end 2'a of which is flared and is connected to the end 1a of the tube 1 via the intermediate ring 3, as already explained with reference to FIG. 14 has been. Flanges 5, 6 serve as clamping means.

In Abwandlung dieses Ausführungsbeispieles ist bei der in Fig. 17 dargestellten Variante des Maschi­nengehäuse 20′ mit einem angeformten Konus 20′a und einem gleichfalls angeformten Flansch 20′b ver­sehen. Der Zwischenring 3 besitzt die anhand von Fig. 14 erläuterte Form. Mittels der Flansche 25′b werden das Rohrende 1a, der Zwischenring 3 und der Konus 20′a unter plastischer Verformung der Dicht­lippen des Zwischenringes 3 miteinander verspannt.In a modification of this embodiment is provided in the variant of the machine housing 20 'shown in Fig. 17' with a molded cone 20'a and a molded flange 20'b. The intermediate ring 3 has the shape explained with reference to FIG. 14. By means of the flanges 25'b, the pipe end 1a, the intermediate ring 3 and the cone 20'a are clamped together with plastic deformation of the sealing lips of the intermediate ring 3.

Das Ausführungsbeispiel gemäß Fig. 18 ähnelt Fig. 17. Das Maschinengehäuse 20′ enthält einen ange­formten Konus 20′a zur Anlage des Zwischenringes 3 sowie Gewindebohrungen 20′c zur Aufnahme von (nicht dargestellten) Spannschrauben, über die der Flansch 5 unter plastischer Verformung der Dichtlippen des Zwischenringes 3 an das Maschi­nengehäuse 20 herangezogen wird.The embodiment according to FIG. 18 is similar to FIG. 17. The machine housing 20 'contains a molded cone 20'a for the bearing of the intermediate ring 3 and threaded bores 20'c for receiving (not shown) clamping screws, via which the flange 5 with plastic deformation of the Sealing lips of the intermediate ring 3 is used on the machine housing 20.

Bei dem in Fig. 19 veranschaulichten Ausführungs­beispiel ist das Maschinengehäuse 20′ mit einem angeformten Stutzen 20′d versehen, der einen Ko­nus 20′a zur Anlage des Zwischenringes 3 aufweist, und der auf seiner äußeren Mantelseite ein Gewinde 20′e aufweist, das zur Aufnahme eines mit Innenge­winde versehenen Flansches 6′ dient. Bei diesem Ausführungsbeispiel kann das Herstellen und Lösen der Verbindung durch eine gemeinsame Drehbewegung der (über Spannmittel miteinander verbundenen) Flansche 5, 6′ um die Rohrachse erfolgen, ohne daß sich hierbei die Relativlage der Flansche 5, 6′ zu­einander ändert.In the embodiment illustrated in FIG. 19, the machine housing 20 'is provided with a molded connection piece 20'd, which has a cone 20'a for contacting the intermediate ring 3, and which has a thread 20'e on its outer casing side, which for Inclusion of an internally threaded flange 6 'is used. In this embodiment, the connection can be made and released by a common rotary movement of the flanges 5, 6 '(which are connected to one another by means of clamping means) about the pipe axis, without the relative position of the flanges 5, 6' changing from one another.

Claims (19)

1. Rohrverbindung, insbesondere dichtungslose Hochdruck-­Rohrverbindung,
gekennzeichnet durch folgende Merkmale: a) zwischen die miteinander zu verbindenden Rohre (1,2) ist ein koaxial angeordneter Zwischenring (3) eingefügt, dessen Außendurchmesser etwas grö­ßer als der Außendurchmesser der Rohre ist; b) an den beiden Stirnseiten des Zwischenringes ist wenigstens je eine ringförmige Dichtfläche vorge­sehen; c) die dem Zwischenring (3) zugewandten Enden (1a, 2a) der miteinander zu verbindenen Rohre (1, 2) be­sitzen einen vergrößerten Durchmesser; d) es sind Spannmittel vorgesehen, durch die die Rohr­enden (1a, 2a) und der Zwischenring (3) in Achs­richtung der Rohre kraftschlüssig verspannt und durch plastische Verformung der Dichtflächen des Zwischenringes und/oder der mit den Dichtflächen in Berührung stehenden Flächen der Rohrenden dicht miteinander verbunden sind. 1. Pipe connection, in particular sealless high pressure pipe connection,
characterized by the following features: a) a coaxially arranged intermediate ring (3) is inserted between the tubes (1, 2) to be connected, the outer diameter of which is somewhat larger than the outer diameter of the tubes; b) at least one annular sealing surface is provided on each of the two end faces of the intermediate ring; c) the ends (1a, 2a) of the pipes (1, 2) to be connected to one another facing the intermediate ring (3) have an enlarged diameter; d) clamping means are provided, by means of which the pipe ends (1a, 2a) and the intermediate ring (3) are non-positively clamped in the axial direction of the pipes and are sealed by plastic deformation of the sealing surfaces of the intermediate ring and / or the surfaces of the pipe ends in contact with the sealing surfaces are interconnected. 2. Rohrverbindung nach Anspruch 1, dadurch gekennzeich­net, daß wenigstens ein Teil (3a, 3b) der Stirnsei­ten des Zwischenringes (3) nach außen zu konisch ab­geschrägt ist.2. Pipe connection according to claim 1, characterized in that at least a part (3a, 3b) of the end faces of the intermediate ring (3) is beveled to the outside. 3. Rohrverbindung nach Anspruch 1, dadurch gekenn­zeicnet, daß die dem Zwischenring (3) zugewandten Enden (1a, 2a) der miteinander zu verbindenden Rohre (1, 2) konisch aufgeweitet sind.3. Pipe connection according to claim 1, characterized in that the ends (1a, 2a) of the pipes (1, 2) to be connected to one another which are facing the intermediate ring (3) are flared. 4. Rohrverbindung nach Anspruch 3, dadurch gekennzeich­net, daß die Stirnseiten des Zwischenringes (3) aus einer senkrecht zur Achse verlaufenden Planfläche und einer hieran nach außen anschließenden Konusflä­che bestehen, wobei am Übergang zwischen Planfläche und Konusfläche eine als Dichtlippe (8,9) ausgebil­dete Dichtfläche vorgesehen ist.4. Pipe connection according to claim 3, characterized in that the end faces of the intermediate ring (3) consist of a plane surface running perpendicular to the axis and a conical surface adjoining it to the outside, with a sealing lip (8, 9) being formed at the transition between the plane surface and the conical surface Sealing surface is provided. 5. Rohrverbindung nach Anspruch 1, dadurch gekennzeich­net, daß im Bereich der beiden Stirnseiten des Zwi­schenringes (3) jeweils mehrere als Dichtlippen (8,9) ausgebildete ringförmige Dichtflächen mit gegenseiti­gem Abstand angeordnet sind.5. Pipe connection according to claim 1, characterized in that in the region of the two end faces of the intermediate ring (3) each have a plurality of sealing lips (8,9) formed annular sealing surfaces are arranged at a mutual distance. 6. Rohrverbindung nach Anspruch 1, dadurch gekennzeich­net, daß der Zwischenring (3) plane Stirnseiten auf­weist, wobei die dem Zwischenring zugewandten Enden (1a, 2a) der miteinander zu verbindenden Rohre (1, 2) konisch aufgeweitet sind und die ringfömigen Dich­flächen (68, 69) durch die äußeren Kanten des Zwi­schenringes (3) gebildet werden.6. Pipe connection according to claim 1, characterized in that the intermediate ring (3) has flat faces, the ends facing the intermediate ring (1a, 2a) of the pipes to be connected (1, 2) are flared and the annular sealing surfaces (68 , 69) are formed by the outer edges of the intermediate ring (3). 7. Rohrverbindung nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die beiden Stirnseiten des Zwi­schenringes (3) nach innen und außen konisch abge­schrägt sind, wobei als Dichtlippen ausgebildete ringförmige Dichtflächen (18, 19) am Übergang zwi­schen den beiden Konusflächen vorgesehen sind.7. Pipe connection according to claims 1 and 2, characterized in that the two end faces of the intermediate ring (3) are beveled inwards and outwards, annular sealing surfaces (18, 19) designed as sealing lips being provided at the transition between the two conical surfaces. 8. Rohrverbindung nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß der Zwischenring (3) aus einem inneren Ringteil (3x) mit planen Stirnseiten und ei­nem äußeren Ringteil (3y) mit konischen Stirnseiten besteht, wobei die Länge des inneren Ringteiles et­was größer als die des äußeren Ringteiles ist, so daß die äußeren Kanten des inneren Ringteiles die ringförmigen Dichtflächen (48, 49) bilden.8. Pipe connection according to claims 1 and 2, characterized in that the intermediate ring (3) consists of an inner ring part (3x) with flat end faces and an outer ring part (3y) with conical end faces, the length of the inner ring part being somewhat greater than is that of the outer ring part, so that the outer edges of the inner ring part form the annular sealing surfaces (48, 49). 9. Rohrverbindung nach Anspruch 1, dadurch gekennzeich­net, daß die mit als Dichtlippen ausgebildeten Dicht­flächen (58, 58′, 58˝, 59, 59′, 59˝) versehenen Stirnseiten des Zwischenringes (3) insgesamt senk­recht zur Achse des Zwischenringes verlaufen und die dem Zwischenring zugewandten Enden (1a, 2a) der mit­einander zu verbindenden Rohre (1, 2) flanschartig, senkrecht zur Rohrachse aufgeweitet sind.9. Pipe connection according to claim 1, characterized in that the end faces of the intermediate ring (3) provided as sealing lips (58, 58 ', 58˝, 59, 59', 59˝) are perpendicular to the axis of the intermediate ring and the the intermediate ring facing ends (1a, 2a) of the pipes (1, 2) to be connected to one another are expanded in a flange-like manner, perpendicular to the pipe axis. 10. Rohrverbindung nach Anspruch 1, dadurch gekennzeich­net, daß der Zwischenring (3) ein im wesentlichen T-förmiges Querschnittsprofil besitzt, wobei der zwi­schen die flanschartig aufgeweiteten Rohrenden (1a, 2a) eingreifende Steg (3w) des Zwischenringes die vorzugsweise durch eine Verdickung von kreisförmigem Querschnitt gebildeten Dichtflächen (78, 79) trägt.10. Pipe connection according to claim 1, characterized in that the intermediate ring (3) has a substantially T-shaped cross-sectional profile, the web (3w) of the intermediate ring engaging between the flange-like widened tube ends (1a, 2a) which is preferably made by a thickening of circular cross section formed sealing surfaces (78, 79) carries. 11. Rohrverbindung nach Anspruch 1, dadurch gekennzeich­net, daß die Aufweitung der Rohrenden (1a, 2a) das 1,1- bis 1,5-fache, vorzugsweise das 1,5- bis 1,2-­fache des Rohrinnendurchmessers beträgt.11. Pipe connection according to claim 1, characterized in that the widening of the pipe ends (1a, 2a) is 1.1 to 1.5 times, preferably 1.5 to 1.2 times the pipe inner diameter. 12. Rohrverbindung nach Anspruch 1, dadurch gekennzeich­net, daß die Spannmittel zwei über Verbindungselemen­te, wie Schrauben oder Niete (7), in axialer Richtung verspannbare Flansche (5, 6) enthalten, deren Bohrungs­durchmesser etwa dem Außendurchmesser der Rohre (1,2) entspricht.12. Pipe connection according to claim 1, characterized in that the clamping means contain two via connecting elements, such as screws or rivets (7), in the axial direction clampable flanges (5, 6), the bore diameter of which corresponds approximately to the outer diameter of the tubes (1,2) . 13. Rohrverbindung nach den Ansprüchen 1, 3 und 12, da­durch gekennzeichnet, daß die Bohrung der Spannmittel auf der dem Zwischenring (3) zugewandten Seite in ei­ne sich zur benachbarten Stirnseite hin erweiternde Konusfläche (5a, 5a) übergeht, deren Konuswinkel dem der Konusfläche der aufgeweiteten Rohrenden entspricht.13. Pipe connection according to claims 1, 3 and 12, characterized in that the bore of the clamping means on the side facing the intermediate ring (3) in a widening towards the adjacent end face conical surface (5a, 5a) whose cone angle that of the conical surface corresponds to the widened pipe ends. 14. Rohrverbindung nach Anspruch 1, dadurch gekennzeich­net, daß die Spannmittel durch zwei verformbare ring­ förmige Vorsprünge (3e, 3f) gebildet werden, die von einem am äußeren Umfang des Zwischenringes (3) ange­ordneten Steg (3g) getragen werden, wobei der Steg (3g) und die beiden ringförmigen Vorsprünge (3e, 3f) fest mit dem Zwischenring (3) verbunden, vorzugsweise ein­stückig mit ihm ausgebildet sind.14. Pipe connection according to claim 1, characterized in that the clamping means by two deformable ring Shaped projections (3e, 3f) are formed, which are supported by a web (3g) arranged on the outer circumference of the intermediate ring (3), the web (3g) and the two annular projections (3e, 3f) being fixed to the intermediate ring ( 3) connected, preferably integrally formed with it. 15. Rohrverbindung nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß der Zwischenring (3) im äußeren Bereich (z) verbreitert ist und sich mit diesem ver­breiterten Bereich an den Stirnseiten der konisch aufgeweiteten Rohrenden (1a, 2a) abstützt.15. Pipe connection according to claims 1 to 3, characterized in that the intermediate ring (3) is widened in the outer region (z) and is supported with this widened region on the end faces of the conically widened pipe ends (1a, 2a). 16. Rohrverbindung nach Anspruch 1, dadurch gekennzeich­net, daß der Zwischenring (3) einen Kern (3k) aus ei­nem Material hoher Festigkeit und eine die Dichtflä­chen bildende, leicht verformbare Oberflächenschicht (3m) enthält.16. Pipe connection according to claim 1, characterized in that the intermediate ring (3) contains a core (3k) made of a material of high strength and an easily deformable surface layer (3m) forming the sealing surfaces. 17. Rohrverbindung nach Anspruch 1, dadurch gekennzeich­net, daß der Zwischenring (3) aus einem Material be­steht, dessen Härte größer als die Härte des Rohr­werkstoffes ist.17. Pipe connection according to claim 1, characterized in that the intermediate ring (3) consists of a material whose hardness is greater than the hardness of the pipe material. 18. Rohrverbindung nach Anspruch 1 in Form eines Rohran­schlusses für Armaturen oder Maschinen, dadurch ge­kennzeichnet, daß das eine der miteinander zu verbin­denden Rohre durch einen an der Armatur bzw. Maschi­ne vorgesehen Stutzen (z.B. 2′, 20′d) mit einem dem Zwischenring (3) angepaßten konus (z.B. 2′a, 20′a) ge­bildet wird.18. Pipe connection according to claim 1 in the form of a pipe connection for fittings or machines, characterized in that the one of the pipes to be connected to one another by a connector provided on the fitting or machine (for example 2 ', 20'd) with one of the intermediate ring ( 3) adapted cone (eg 2'a, 20'a) is formed. 19. Rohrverbindung nach Anspruch 18, dadurch gekennzeich­net, daß der Stutzen (20′d) mit einem Außengewinde (20e) versehen ist, auf dem ein mit Innengewinde ver­sehener, als Spannmittel dienender Flansch (6′) in Achsrichtung verstellbar ist.19. Pipe connection according to claim 18, characterized in that the connecting piece (20'd) is provided with an external thread (20e) on which an internally threaded flange (6 ') serving as a clamping means is adjustable in the axial direction.
EP19880118296 1987-11-30 1988-11-03 Pipe joint Expired - Lifetime EP0318715B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88118296T ATE60414T1 (en) 1987-11-30 1988-11-03 PIPE CONNECTION.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3740585 1987-11-30
DE3740585 1987-11-30
DE3819729 1988-06-09
DE3819729A DE3819729A1 (en) 1987-11-30 1988-06-09 PIPE CONNECTION

Publications (2)

Publication Number Publication Date
EP0318715A1 true EP0318715A1 (en) 1989-06-07
EP0318715B1 EP0318715B1 (en) 1991-01-23

Family

ID=25862300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880118296 Expired - Lifetime EP0318715B1 (en) 1987-11-30 1988-11-03 Pipe joint

Country Status (6)

Country Link
US (1) US5120086A (en)
EP (1) EP0318715B1 (en)
CA (1) CA1322563C (en)
DE (2) DE3819729A1 (en)
ES (1) ES2020321B3 (en)
GR (1) GR3001400T3 (en)

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DE202004000202U1 (en) * 2004-01-09 2004-06-17 Otte, Bernd Flared fitting for connecting two pipe parts, has an intermediate ring between the inner cones of flange tulips, and intermediate ring can be tightened by union parts

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US6116522A (en) * 1996-04-16 2000-09-12 Motorenfabrik Hatz Gmbh & Co. Kg Fuel injection device
DE19614980C1 (en) * 1996-04-16 1997-09-18 Hatz Motoren Injector
DE59912428D1 (en) 1999-01-25 2005-09-22 Jrg Gunzenhauser Ag Sissach Screwable pipe connection
US6357760B1 (en) * 2000-05-19 2002-03-19 Michael Doyle Ring seal
FR2833065B1 (en) * 2001-12-05 2004-09-03 Caillau Ets CLAMPING SYSTEM FOR THE SEALED CONNECTION OF TWO TUBES HAVING SUPPORT SURFACES
NZ545783A (en) * 2003-10-08 2010-03-26 James Hardie Int Finance Bv A fibre reinforced cement column and method of forming on a lathe automatically adjusting for surface imperfections
US20050134045A1 (en) * 2003-12-18 2005-06-23 Meera Mohan Internally collared pipe joining system
TWM283099U (en) * 2005-07-07 2005-12-11 Allied Supreme Corp Pipe joint
ES2389381T3 (en) * 2006-02-17 2012-10-25 Parker Hannifin Manufacturinggermany Gmbh & Co. Kg Tube connection device
US7819437B2 (en) * 2008-05-30 2010-10-26 Parker-Hannifin Corporation Flexible captive flange hose connection and method
DE102008049925A1 (en) * 2008-10-02 2010-04-08 J. Eberspächer GmbH & Co. KG Connection method for tubular components
DE102012213339A1 (en) * 2012-07-30 2014-05-15 Siemens Aktiengesellschaft Losflanschanordnung for an electric power transmission device
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Also Published As

Publication number Publication date
CA1322563C (en) 1993-09-28
DE3819729A1 (en) 1989-06-08
DE3861666D1 (en) 1991-02-28
GR3001400T3 (en) 1992-09-11
EP0318715B1 (en) 1991-01-23
US5120086A (en) 1992-06-09
ES2020321B3 (en) 1991-08-01

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